Re: [PATCH 1/9] vfio: Make vfio_(un)register_notifier accept a vfio_device

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On 4/12/22 11:53, Jason Gunthorpe wrote:
All callers have a struct vfio_device trivially available, pass it in
directly and avoid calling the expensive vfio_group_get_from_dev().

To support the unconverted kvmgt mdev driver add
mdev_legacy_get_vfio_device() which will return the vfio_device pointer
vfio_mdev.c puts in the drv_data.

Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
...
diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c
index 6e08d04b605d6e..69768061cd7bd9 100644
--- a/drivers/s390/crypto/vfio_ap_ops.c
+++ b/drivers/s390/crypto/vfio_ap_ops.c
@@ -1406,21 +1406,21 @@ static int vfio_ap_mdev_open_device(struct vfio_device *vdev)
  	matrix_mdev->group_notifier.notifier_call = vfio_ap_mdev_group_notifier;
  	events = VFIO_GROUP_NOTIFY_SET_KVM;
- ret = vfio_register_notifier(vdev->dev, VFIO_GROUP_NOTIFY,
-				     &events, &matrix_mdev->group_notifier);
+	ret = vfio_register_notifier(vdev, VFIO_GROUP_NOTIFY, &events,
+				     &matrix_mdev->group_notifier);
  	if (ret)
  		return ret;
matrix_mdev->iommu_notifier.notifier_call = vfio_ap_mdev_iommu_notifier;
  	events = VFIO_IOMMU_NOTIFY_DMA_UNMAP;
-	ret = vfio_register_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
-				     &events, &matrix_mdev->iommu_notifier);
+	ret = vfio_register_notifier(vdev, VFIO_IOMMU_NOTIFY, &events,
+				     &matrix_mdev->iommu_notifier);
  	if (ret)
  		goto out_unregister_group;
  	return 0;
out_unregister_group:
-	vfio_unregister_notifier(vdev->dev, VFIO_GROUP_NOTIFY,
+	vfio_unregister_notifier(vdev, VFIO_GROUP_NOTIFY,
  				 &matrix_mdev->group_notifier);
  	return ret;
  }
@@ -1430,9 +1430,9 @@ static void vfio_ap_mdev_close_device(struct vfio_device *vdev)
  	struct ap_matrix_mdev *matrix_mdev =
  		container_of(vdev, struct ap_matrix_mdev, vdev);
- vfio_unregister_notifier(vdev->dev, VFIO_IOMMU_NOTIFY,
+	vfio_unregister_notifier(vdev, VFIO_IOMMU_NOTIFY,
  				 &matrix_mdev->iommu_notifier);
-	vfio_unregister_notifier(vdev->dev, VFIO_GROUP_NOTIFY,
+	vfio_unregister_notifier(vdev, VFIO_GROUP_NOTIFY,
  				 &matrix_mdev->group_notifier);
  	vfio_ap_mdev_unset_kvm(matrix_mdev);
  }
looks good for vfio_ap.
Reviewed-by: Jason J. Herne <jjherne@xxxxxxxxxxxxx>


--
-- Jason J. Herne (jjherne@xxxxxxxxxxxxx)



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